Cotton gin



4 June 11, 1929. c, pngss z-y 1,717.32.

COTTON GIN Filed Nov. 17, 1928 I, i MM/l/fllM/lll/Il/IIIIIIIIIIIIII M wW I II I CRPPLSSLEY INVENTOR.

ATTORNEY Patented June 11, 1929.

CLARENCE R.PRESSLEY, 013 FORT WORTH, TEXAS.

COTTON GIN.

Application filed November 17, 1928. Serial No. 320,090.

My invention relates to cotton gins and more particularly to means forpreventing the choking of the cotton about the ribs of the gin; and theobject is to provide revolving ribs and other ribs which cooperate withthe revolving ribs for preventing the choking of the ribs and saws andwhich will reduce the power required to run the gin mechanism and whichwill make it possible for the gin to run much faster because theimprovements reduce friction by preventingthecotton from crowding andrubbing against the saws and ribs, and for these reasons theimprovements make the operation of the gin more economical. Anotheradvantage is that the fire hazard is reduced by preventing friction ofthe saws and ribs against the cotton. It has been discovered that thecause of the fire in many instances is the friction of the cotton andsaws and the particular location of the trouble is the cotton thatbecomes hung on the ribs and bears against the saws on the underside ofthe ribs, that is, after the saw teeth pass the ribs, the saws rubagainst the cotton that is clinging to the ribs and this is where thefireoriginates. The object is to provide, in addition to the ribsheretofore provided, re-

volving ribs that will throw the cotton roll back away from the pointswhere the saws pass through the stationary ribs and to change the shapesof the stationary ribs to cooperate with the revolving ribs. Anotherimprovement is a dotting roller for cooperating with the revolving ribs,which will aid in forming the roll in the roll box. Another advantage ofthe dofing roller is that it will protect the cotton seed by preventingthe cracking of the seed. Other objects and ad vantages will be fullyexplained in the following description, and the invention will be moreparticularly pointed out in the claims.

Reference is had to the drawings which form a cation.

Fig. 1 is a perspective View of a gin with the gin breast raised to showthe location of part of the improvements.

Fig. 2 is a vertical section of the bearings for the revolving ribs andthe dofiing roller, parts being broken.

Fig. 3 is a side elevation in part of a gin, showing the location of theimprovements.

Fig. 4 is a detail view of one of the ribs.

Fig. 5 is a detail view of one of the heads.

accompanying part of this applithe drawings provided with theimprovements and saws and a brush drum. The gin has the usual roll boxwhich is a space above the saws 2, a brush drum 3, and other parts notnecessary to be described in this application. The gin has stationaryribs 5 attached at their lower ends to a frame member 6. This member 6is a part of the gin breast and may be swung upwardly for differentpurposes, as for cleaning the saws, to inspect the working parts. Theribs 5 are different from any other ribs of gins. The lower parts aresimilar to the lower parts of the usual gin ribs, but the ribs haveacuate dividers 8 which cooperate with the saws 2 and the revolving ribsand the doflin roller to form a roll of cotton in the rol box. Thedividers 8 conform approximately to the curvature of the revolving ribs10 and the ribs have curved portions 9 which stand in close proximitytothe revolving ribs 10 and the ribs are attached to the backside of thegin rail 7 The object of this construction and arrangement is to locatethe parts of the ribs through which the saws pass as far away aspractical from the roll in the roll box. The saws 2 pass through theribs 10 at approximately the parts 11 of the ribs 5, the saws havingalready passed through the ribs 10. The dividers 8 and the rolling ribs10 prevent the crowding of the seed and unginned cotton at the points 11of the ribs 5. There are advantages in this provision because the lintis more quickly removed from the seed due to the non-crowding or packingof the cotton and seed against the ribs at parts 11 and the lint is moreeasily removed from the saws after the saws leave the ribs at parts 11.This isthe danger point of fire and the fire hazard is removed by theconstruction and arrangement shown. The reason for this is that no lintcotton-hangs on the ribs to rub against the sides of the saws. Thedanger to be removed was the rubbing of the saws against the lint cottonwhich was clinging to the ribs. This rubbing created enough friction tocause ignition.

The saws 2 run as the arrow head shown in Fig. 3, which direction isclockwise. The re volving ribs are mounted to run in the same direction,that is, clockwise. The ribs 10 are rigid with a shaft 12 and the shaft12 is journaled in heads 13 and 14 and these heads are provided withjournal boxes or bearings 15 which are integral therewith and the boxes15 support antifriction bearings 16. Acap 17 holds the bearings 16 inplace. A dofiing roller 18 is provided with a shaft 19 which isjournaled in bearings 20 which are integral with the heads 13 and 1 1and antifriction bearings 21 are provided for the shaft 19 and thesebearings are held in place by a cap 17 The periphery of the roller 18 iscorrugated and this roller cooperates with the revolving ribs 10 informing a roll in the roll box. The corrugated dofling roller 18 isnecessary for the successful operation of the gin and to protect theseed of the cotton. The doffing roller prevents seed and seed cottonfrom being thrown behind the revolving ribs. The dofiing roller willprotect the seed by preventing the crack- 7 ing of the seed. The featureof the cotton being prevented from passing behind the re volving ribsremoves a fire hazard. The dofting roller also assists in turning theroll of cotton in the roll in the roll box and is absolutely necessaryfor the successful operation of the revolving ribs.

WVhat I claim is 1. In a cotton gin provided with a gang of saws, aframe, and a roll box; ribs attached to said frame and positionedbetween said saws and means for forming a roll in said roll boxandsimultaneously spacing the passage point of said saws. from said ribsconsisting of dividers formed on said ribs, curved revolving ribspositioned partly above said saws and running in the same direction assaid saws and port-ions of the revolving ribs running between said saws,said stationary ribs being curved under and behind said revolving ribs,and a corrugated dotting roller positioned above said revolving ribs andco operating with said revolving ribs by preventing cotton from beingthrown behind the revolving ribs and by pressing cotton into the roll inthe roll box.

2. In a cotton gin provided with a gang of saws, a frame, and a rollbox; a swinging frame including upper and lower rails hingedly connectedto the gin frame, bearing heads attached to said upper and lower rails,revolving ribs provided with a shaft journaled in said bearing heads andsaid revolving ribs running partly between said saws, stationary ribsattached at their lower ends to said lower rail and positioned partlybetween said saws and having integral dividers curved upward slightly infront of said revolving ribs and members curved under and behind saidrevolving ribs and attached at their upper ends to the rear side of saidupper rail, said revolving ribs serving to brush seed and seed cottonback from the points where said saws leave said stationary ribs and topress the cotton and seed into the roll in said roll box, and a dofiingroller journaled in said heads and provided with a corrugated peripherycooperating with said revolving ribs.

3. In a cotton gin provided with a gang of saws, a frame, and a rollbox; stationary ribs attached to said frame and provided with downwardlyand upwardly curved members, revolving ribs having a shaft journaled insaid frame and positioned partly in the curve of said ribs and runningpartly between said saws, and a corrugated doffing roller journaled insaid frame and serving to prevent cotton and cotton seed from beingthrown backwardly of said revolving ribs without breaking the seed.

In testimony whereof, I set my hand, this 12th day of November, 1928.

CLARENCE R. PRESSLEY.

